Ann & Steve Toon / Dust devil in Amboseli National Park in dry season, Kenya, October 2012

Roy Mangersnes / Bushfire and dust devils in the Central Kalahari Game Reserve, Botswana, November

Charlie Summers / Massive dust devil rakes the dry shoreline of Lake Ndutu, Ngorongoro Conservation Area, Tanzania.

Rhonda Klevansky / Dust devil near Salar de Chalviri, Altiplano, Bolivia. February 2009.

Gerry Ellis / Dust devil racing across dry river valley, Namib-Naukluft National Park, Namibia

RHONDA KLEVANSKY / Dust devil spinning across dry Salar Pujsa, Atacama Desert, Chile

Gertrud & Helmut Denzau / Dust tornado touches down on Tibetan Plateau landscape, Ladakh, North East India

Jabruson / Dust devil on dry Lake Nakuru. Lake Nakuru NP, Kenya.

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) colony and dust devil, caused by temperature contrast ranging from night-time -25 degrees celsius to daytime +20 degrees Celsius, Eduardo Avaroa Faunistic Reserve...

RHONDA KLEVANSKY / Salar pujsa, dust devil, Atacama desert, Chile

Peter Blackwell / Dust devil in distance, Amboseli National Park, Kenya, East Africa

Jabruson / Dust devil on dry Lake Nakuru Lake Nakuru NP Kenya